Edge binding



E. E. BREY EDGE BINDING Original Filed Au 2, 19:54

Apr-i128, 1936.

INV EN'I'OR '7" 7 64.47 and Man Patented Apr. 28, 1936 EDGE BINDINGEugene E. Brey, Pittsburgh, Pa., assignor to'Tracy ManufacturingCompany, a corporation of Pennsylvania Original application August 2,1934, Serial -738,087. Divided and this applicationMarch 30, 1935,Serial No. 13,928

. r '1 Claims. This invention relates tothe edge binding of a compositestructure, suitable foruse as a sink top, or for use as a table top;this constituting a division of my co-pending application Serial. No.738,087, (filed August 2, 1934.

' For many reasons it is desirable in sink and table construction, andparticularly in sink construction, to utilize for the sink or table topacomposite material comprising a base of sheet metal, and a coveringconsisting of a substantial depth of some suitable yielding material.While various materials, more or less yielding in their nature, havebeen used, linoleum'is the face covering most commonly employed.

As used upon a woodenbase, it has been the custom to unite the linoleumcovering to the wooden base by means of water-proof glue. Even if thelinoleum covering be thus applied to wood,

there is a tendency for the c'overing to curl or creep away from thebase at the edge of the composite piece. This tendency is even moremarked when linoleum is glued to a base of sheet metal, even thoughadhesive of the best waterproof sort be used in eifecting the attachmentof the covering.

It is, therefore, an object of my invention to provide a composite sinktop, or table top, in which the composite material comprising a metallicbase and a covering of linoleum, or the like, is neatly and adequatelybound along its edges to provide a construction in which the covering isfirmly bound to the base, and. in which the edge binding is of pleasingappearance in itself, and gives a pleasing appearance to the sink top,or table top, as a whole.

Another object of my invention is to' provide a composite, planestructure, for use more particularly as a sink top, in which the edgebinding is raised to form a head around the edges of the sink top, toprevent undesired drainage along the edges of the sink top, such beadededge binding being adequately supported, and being of gracefulappearance. In the accompanying drawing Fig. I is a plan view of a sinktop, comprising a drain board of composite material comprising a metalbase and a covering of linoleum, or the like, showing the free edges ofthe structure bound by means of my preferred, beaded form of edgebinding.

Fig. II is a fragmentary,- cross-sectional view on an enlarged scale,taken on the line 11-11 of a Fig. I, and illustrating the attachment ofmy preferredform of edge binding to the composite structure of the drainboard.

.my preferred form of edge" binding is shown,

' creeping FigQIII is a similar view, showing a modified, andsimplified, form of edge binding.

Referring to Fig. not the drawing in which reference numeral lrepresents the sheet metalbase' of a sink drain board, and referencenumeral 2 represents a covering which is of linoleum, compressible andwaterproof fibre board, micarta, or the like, but which desirably islinoleum. This covering 2 is adhesively attached to the sheet metal baseI, by a suitable adhesive, such as waterproof glue. As above. explained,even though attached to the metal base by an adhesive of the mostsuitable grade, there is atendency for the covering 2 to curl away fromthe base I at the edge 0: the composite structure, and there is also atendency for the covering to creep on the base to extenda. slightdistance therebeyond. may be due either, to relative expansion orcontraction of the two elements of the composite drain board, or mayresult from a pulling away of the covering in' one region, and anover-extension of the covering in another region. This figure of thedrawing shows my preferred means for binding the edges of the compositestructure as used for the drain board of a sink.

My edge binding is formed of light-gauge metal, which is resilient, andwhich is rust resistant. I have found certain resilient grades ofstainless steel suitable for the purpose. The connection between thesheet metal base I, of the drain board and the edge binding is providedby a skirt 3 depending along the edge of thesheet metal base I to formsubstantially a right-angle with the plane of the base. As shown in Fig.II,

- a flange 4 extends rearwardly and downwardly to form an obtuse anglewith the skirt 3.

The edging itself is a formed strip comprising a body region 5, whichextends vertically in assembly of the strip with the edge of thecomposite drain. board. Extending rearwardly at right-angles to thelower terminal of body 5 is a flange 6. At the upper terminal of edgingbody 5 a flange I is extended rearwardly, and is bowed upwardly at 8 toprovide a smoothly curved bead.

The entire vertical space between upper flange 1 of the edging strip andlower flange 6 of the edging strip is made very slightly less than thedistance between the surfaces of the covering 2 and flange I of thesheet metal base to be embraced by the edging strip. In assembly,therefore, the edging strip is snapped into position, with the mostrearwardly extending portion 9 of its flange 1 lying on the surface ofthe covering 2, and'with its lower flange i engaging flange I on thedepending skirt a of the base. Engagement of theedging strip'in thisposition is assisted by the difference in angularitybetween the baseflange land the flange 6 of the edging strip, and desirably a pluralityof bolts Ill, interconnecting the flanges'4 and 6, are applied atintervals along the length of the strip.

Along its edge the covering 2 is rabbeted to a depth equal to thethickness of the foot 9 of flange 1, which extends in a plane parallelto the plane of the covering 2. In mounting the edg ng strip at the edgeof the composite structure, therefore, a countersunk effect is obtained,with the upper face of flange foot 9 lying flush with the upper face ofcovering 2. This countersunk mounting provides an engagement between theedging strip and the covering, which prevents the entry of moisturetherebetween. Additionally, it provides a vertical engagement betweenthe rearward terminal of the edging strip and the shoulder formed in thecovering material. positively to prevent edge creeping of the coveringmaterial relatively to the base.

Because of its upwardly bowed region 8, the upper flange l of the edgingstrip is out of direct contact with the covering 2 throughout asubstantial portion of its lateral extent. If means were not provided toremedy this condition, there would be a, tendency for the coveringmaterial to curl at its edge within the concavityprovided by the bow ofthe flange. Also the upwardly bowed region of the edging strip, beingunsupported, would be susceptible to deformation by blows and pressure.I, therefore, prior to positioning the edging strip on the drain board,adhesively attach a filler strip H to the chamfered face ll ofthecovering. This filler strip ll may be of wood, or other suitablecomposition, which readily may be made to adhere to the surface of thecovering. As will be seen in Fig. 11, it is formed with a plane undersurface, to rest throughout on the face of the covering material, and isformed throughout the remainder of its sectional contour in conformitywith the contour of the cavity within the bowed region 8 of the flange.

Filler strip llftlierefore, by interposition between the edge. ofcovering 2 and the resilient edging stn'p, permits positive binding atthe margin of the covering, and in its other function so supports thebow 8 of the edging strip as to prevent deformation of the strip in thisregion.

As indicated above..the form of edging strip construction shown inFig.-II is my preferred form for binding the edges of the composite bodyof 4 a. sink drain board This is for the reason that the raised bead,provided along the edges of the drain board by the upwardly bowed region8. of

the edging strip, tends to prevent drainage of liquids ove'r'the edgesof the drain board, so that the liquids may flow, or be swept, into thebasin l3 of the drain board.

. Fig. III of the drawing shows an edge binding.

which, because of the absence of a head, is less desirable for use on adrain board of a sink, but which is suitable for binding desk or tabletops formed of a sheet metal base, and a covering of linoleum, or thelike.

In Fig. III of the drawing sheet metal base la has thereon, as covering,a substantial thickness 20. of linoleum or the like, adhesively attachedto the base. Along its margin, covering 2a has a similarly chamferedregion Ha. in which lies an upper flange Ia, extending rearwardly fromthe body So of the edging strip. Flange la is not bowed upwardly as inFig. II, but lies in the chamfered region Ha of the covering 2a, withits upper face flush with the upper surface of the cover, being mountedin countersunk relation to the covering.

Fig. HI of the drawing also illustrates modi- "In this modificationdifference in 'angularity between the lower flanges on the sheet metalbase and on the binding strip is obtained by an arrangement of partsslightly diflerent from that shown in Fig. II, but is functionallyidentical with the engagement shown in Fig. II. If desired, differencein angularity, as provided by flanges 4a and 6a, may be utilized formounting the beaded edging strip as shown in Fig. II.

It will be noted that in either form of, edging strip, a plane region ofthe binding strip deflnitely overlies and engages a plane zone ofsubstantial width in the marginal region of the covering, firmly bindingit to the sheet metal base. Also it should be noted that the rabbeting,to provide an inset marginal region of relatively great width, causesthe inner edge of the binding strip flange to abut ashoulder at theinner edge of the rabbeting. These factors are of primaryimportance ingiving an engagement of the covering to the base which definitelyresists any tendency for the marginal edge of the coverdown upon theupper face of the covering.

While linoleum is the preferred covering for the metal base of a sink,because its yielding nature tends to lessen breakage of fragilearticles, other less yielding, waterproof, covering materials-may beused. Micarta has been mentioned above, and there are various treatedfibre boards, and resin base compositions, which may be satisfactorilyemployed.

I claim as my invention:

1. Fcruse as an element of a sink a drain board of composite structurehaving a sheet met a1 base and a covering of waterproof and flexiblenon-metallic material cemented on said metallic base, saidQnon-metalliccovering being rabbeted along its edges to provide an inset marginalzone, a. binding strip of light-gauge metal resiliently embracing saidmetallic base and said non-metallic covering in the region of itsrabbeting, said strip being bowed transversely to present a concavesurface to said covering, and a relatively rigid filler strip having aface contoured to fit the concavity of thebinding strip' and having aflat'face arranged to bear upon the edge of said flexible coveringpositively to terial of substantial thickness on said base, saidmaterial being rabbeted along its edges to pro- ,waterproof non-metallicmaterial cemented on said metallic base, s aid non-metallic coveringbevide an inset marginal zone having a plane upper surface, a bindingstrip of light-gauge metal resiliently engaging beneath the sheet metalbase of the structure and marginally engaging the covering, said bindingstrip being bowed transversely to present concave regional surface tosaid covering, and a filler strip having a face contoured to fit theconcavity of the binding strip and having a plane surface adapted tobear upon the face of the covering in its terminal marginal region,

said binding strip having a longitudinal plane region lying upon theplane upper surface of said rabbeted marginal zone with the uppersurface of said'region of the binding strip approximately flush with theupper surface of the covering disposed inwardly of said marginal zone.

3. For use as an element of a sink a drain board of composite structurehaving a sheet metal base and a covering of waterproof, non-metallicmaterial of substantial thickness on said base, said material beingrabbeted along its edges to provide an inset marginal zone having aplane upper surface, a binding strip of light-gauge metal resilientlyengaging beneath the sheet metal base of the structure and marginallyengaging the covering, said binding strip being bowed transversely topresent a concave regional surface to said covering and having alongitudinal plane region lying rearwardly of the bowed portion of thebinding strip vupon the plane upper surface of said rabbeted marginalzone with the upper surface of saidregion of the binding stripapproximately flush with the upper surface of the covering disposedinwardly of said marginal zone.

4. For use as an element of a sink or table a drain board or table topof composite structure having a sheet metal base and a covering ofwaterproof and flexible non-metallic material cemented on said metallicbase, saidflexible nonmetallic covering being rabbeted along its edges,

and a binding strip of light-gauge metal resiliently embracing saidmetallic base and said flexible covering in the region of its rabbeting,said strip being bowed transversely to present an overlying concavityhousing the extreme edge of the flexible non-metallic covering, and saidbinding strip having a longitudinally extending foot projected inwardlyfrom the base of the bowed portion thereof to lie flat .upon therabbeted edge region of the flexible covering and arranged thereby topresent :obstruction to creeping of the flexible covering by edgeabutment with the shoulder of the covering formed by the rabbeting, thebinding strip in the assembly providing a water-tightwater-restrainingedge binding resistant to creeping of the covering.

5, For use as an element of a sink or table a r 3 drain board or tabletop of composite structure having a sheet metal base and a covering ofing rabbeted along; its edges, 9. binding strip of light-gauge metalresiliently embracing said metallic base and said flexible covering inthe region of its rabbeting, said strip being bowed transversely topresent ah overlying concavity to the extreme edge of the "covering anda longitudinally extending foot pro ected inwardly from the base of thebowed portion and pressed flat against the surface of the non-metalliccovering in the rabbeted edge region thereof and having its edge in edgeabutment with the shoulder in the covk ering formed by the edgerabbetin'g thereof, whereby the binding strip provides a water-tightwater-restraining edge binding resistant to creeping of the covering. l

6. For use as an element of a sink or table a drain board or table topof composite structure having a sheet metal base and a covering ofwaterproof non-metallic material cemented on said metallic base, saidnon-metallic covering being rabbeted along its edges, a binding strip oflight-gauge metal resiliently embracing said metallic base and saidnon-metallic covering in the region of its rabbeting, said strip beingbowed transversely to present a concave surface to the rabbeted regionof the covering, a longitudinally, extending foot projected inwardlyfrom the base of the bowed portion and lying flat against the surface ofthe non-metallic covering in the rabbeted regionthereof and having itsedge in edge abutment with the shoulder in the covering formed by theedge rabbeting thereof, and a rigid binding-strip having a facecontoured to fit the concavity of the bowed region of the binding stripand having its surface presented to the rabbeted surface of the coveringshaped to match the shape of the region of the covering contactedsiliently embracing said metallic base and nonmetallic, covering alongthe edge thereof, said strip being bowed transversely to present concavesurface to said covering, and a rigid filler strip in the concavity ofthe said binding strip and bearing against the surface of the saidnonmetallic covering, said fllier strip having a sur- 755 face contouredto fit the concavity of ,the binding strip and having a surfacecontoured to match the surface of theregion of the covering which itcontacts.

- EUGENE E. BREY.

